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Commit ceeb41c7 authored by Rama Krishna Phani A's avatar Rama Krishna Phani A
Browse files

hwmon: qpnp-adc-tm : Use gain parameters for reverse scaling 



ADC_TM uses different reverse scaling functions for different
prescaling values. Use gain parameters such that we can have a
generic reverse scaling function for different prescaling values.

Change-Id: I1254580ed985bb825c3371b804d7d4a7e032241e
Signed-off-by: default avatarRama Krishna Phani A <rphani@codeaurora.org>
parent 7d54fbdb

drivers/hwmon/qpnp-adc-common.c

+2 −2
Original line number Diff line number Diff line
@@ -1236,7 +1236,7 @@ int32_t qpnp_adc_vbatt_rscaler(struct qpnp_vadc_chip *chip, 
	if (rc < 0)

		return rc;



	low_thr = (((param->low_thr/3) - QPNP_ADC_625_UV) *

	low_thr = (((param->low_thr/param->gain_den) - QPNP_ADC_625_UV) *

				vbatt_param.dy);

	if (low_thr < 0) {

		sign = 1;
@@ -1248,7 +1248,7 @@ int32_t qpnp_adc_vbatt_rscaler(struct qpnp_vadc_chip *chip, 
	*low_threshold = low_thr + vbatt_param.adc_gnd;



	sign = 0;

	high_thr = (((param->high_thr/3) - QPNP_ADC_625_UV) *

	high_thr = (((param->high_thr/param->gain_den) - QPNP_ADC_625_UV) *

				vbatt_param.dy);

	if (high_thr < 0) {

		sign = 1;

drivers/thermal/qpnp-adc-tm.c

+12 −1
Original line number Diff line number Diff line
@@ -2018,7 +2018,7 @@ static struct thermal_zone_device_ops qpnp_adc_tm_thermal_ops = { 
int32_t qpnp_adc_tm_channel_measure(struct qpnp_adc_tm_chip *chip,

					struct qpnp_adc_tm_btm_param *param)

{

	uint32_t channel, dt_index = 0, scale_type = 0;

	uint32_t channel, amux_prescaling, dt_index = 0, scale_type = 0;

	int rc = 0, i = 0, version = 0;

	bool chan_found = false;
@@ -2072,8 +2072,19 @@ int32_t qpnp_adc_tm_channel_measure(struct qpnp_adc_tm_chip *chip, 
		goto fail_unlock;

	}





	amux_prescaling =

		chip->adc->adc_channels[dt_index].chan_path_prescaling;



	if (amux_prescaling >= PATH_SCALING_NONE) {

		rc = -EINVAL;

		goto fail_unlock;

	}



	pr_debug("channel:%d, scale_type:%d, dt_idx:%d",

					channel, scale_type, dt_index);

	param->gain_num = qpnp_vadc_amux_scaling_ratio[amux_prescaling].num;

	param->gain_den = qpnp_vadc_amux_scaling_ratio[amux_prescaling].den;

	chip->adc->amux_prop->amux_channel = channel;

	chip->adc->amux_prop->decimation =

			chip->adc->adc_channels[dt_index].adc_decimation;

include/linux/qpnp/qpnp-adc.h

+2 −0
Original line number Diff line number Diff line
@@ -807,6 +807,8 @@ struct qpnp_adc_tm_btm_param { 
	int32_t					low_temp;

	int32_t					high_thr;

	int32_t					low_thr;

	int32_t					gain_num;

	int32_t					gain_den;

	enum qpnp_vadc_channels			channel;

	enum qpnp_state_request			state_request;

	enum qpnp_adc_meas_timer_1		timer_interval;